The yearly demand for a seasonal, profitable item follows the distribution: Demand (Units) Probability 1,000 0.20 2,000 0.30 3,000 0.40 4,000 0.10 A manufacture is considering launching a project to produce this item and could produce it by one of three methods: 1) Use existing tools at a cost of $6 per unit. 2) Buy cheap, special equipment for $1000. The value of the equipment at the end of the year is zero. The cost would be reduced to $3 per unit. 3) Buy high-quality, special equipment for $10,000 that can be depreciated over four years (one fourth of the cost each year). The cost with this equipment would only be $2 per unit. Set up this project as a decision tree to find the expected cost of each method. Which method should be used to minimise the cost